8″ / 225 mm
Nominal diameter
45 Hz
Resonance
0.46
Q factor
94 dB
Sensitivity
± 1 mm
Linear excursion
200 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.8
dB
Frequency response
30 - 20000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
45.0
Hz
Mechanical quality factor
QMS
4.79
Electrical quality factor
QES
0.51
Total quality factor
QTS
0.46
Large signal parameters
Maximum linear excursion
xmax
1.0
mm
Air volume displaced at xmax
VD
21
cm³
Power handling
P
100
W
Program power
Pmax
200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.4
Ω
Inductance (1kHz)
LE
0.09
mH
VC Diameter
39
mm
Magnet
Flux density
B
1.75
T
Force factor
Bl
7.25
N/A
Motor constant
Bl/√RE
2.66
N/√W
Air gap height
HAG
4
mm
Diameter
115
mm
Diaphragm
Effective diameter
164
mm
Effective area
SD
210
cm²
Moving mass
MMS
12.8
g
Moving mass (without air load)
MMD
10.4
g
Suspensions
Stiffness
KMS
1.12
N/mm
Compliance
CMS
895
µm/N
Equivalent volume to the compliance
VAS
56
L
Mechanical resistance
RMS
0.75
N·s/m
Dimensions
Nominal diameter
8
″
225
mm
Overall diameter
225
mm
Baffle cutout diameter
190
mm
Overall depth
76
mm
Flange thickness
9
mm
Mounting depth
67
mm
Volume occupied by the driver (estimated)
0.67
L
Similar speaker drivers to Lowther PM6C
8″Full-range
fS
45 Hz
SD
210 cm²
30 - 20000 Hz
QTS
0.46
xmax
1.0 mm
SPL1W
94 dB
Bl/√RE
2.68
Pmax
200 W
8″Full-range
fS
45 Hz
SD
220 cm²
45 - 20000 Hz
QTS
0.44
xmax
5.0 mm
SPL1W
95 dB
Bl/√RE
2.02
Pmax
60 W
10″Subwoofer
fS
43 Hz
SD
355 cm²
31 - 4900 Hz
QTS
0.39
xmax
2.0 mm
SPL1W
93 dB
Bl/√RE
4.71
Pmax
280 W